shower mixer taps

[cobblermartin]

i would like to change my existing bath taps to shower mixer.ive been told that i can use the cold mains water,but i always thought that the water pressure had to be equal for safety reasons.can anyone help?

 

[masona]

Yes,the cold feed should come from the cold storage tank for equal pressure.You will have great difficulty controlling the water temperature as the main feed can push back to the mixer tap up to the hot feed line as it is greater pressure.If anyone in the house turn on the cold feed,the cold feed from the main will be reduce and therefore shower will become hot water only.(ouch!)

 

[ogoshi]

You can fit a pressure equalising valve to the pipes under the bath.This will reduce the pressure to the cold tap to equal that of the hot tap.

 

[masona]

ogoshi,

I do know about the pressure equalising valve,how efficient are they ? Is this just fitted on the cold mains ?

Thanks

 

[ogoshi]

It fits to both hot and cold pipes.Perhaps it would be more acurate to say hot and cold pipes run through it.It comes as a double unit,either 22+22mm,
22+15mm or 15+15mm.They are very efficient and have to meet relevant byelaws.(cant remember which byelaws and havent got my book to hand.)I havent used one for couple of years ,but i think they cost around £40.Hope this helps.

 

[cobblermartin]

thanks for the advice on bath mixers.sorry its a bit late ,new to this game,cobblermartin